Sulfur-rich protein and calcium in the "Budwig protocol" is provided by cottage cheese. Because many people can not take "dairy", lets look more closely at the cottage cheese. Human milk is higher in whey and much lower in casein than cow milk or goat milk; casein is the main protein in cheese and cottage cheese. Caseins differ somewhat; cow milk contains a lot of alpha-casein, which because of its different properties is the main cause of milk and "dairy" indigestion in humans. Beta lactoglobulins in cow milk can also be problematic as allergens, and cow milk also contains more alpha s1-casein than goat milk. All of this explains why many people find goat milk less problematic than cow milk.
The problematic milk components can be removed leaving low-fat whey, most of which is an exact match across the whole mammalian order. The common ingredients are more easily assimilated than any other protein and do not produce sensitivity or allergy issues. The Physicians Desktop Reference for Prescription Drugs lists one pure whey isolate as "well-tolerated by even severely milk-sensitive individuals", and practice corroborates that.
Bottom line - although biological incompatibilities exist in foreign milk, comments that lump 'dairy' products together as problematic are sloppy; the statement does not apply to high-quality whey, and it is widely acknowledged to be the most healthy fraction of milk.
The Budwig Diet revision uses undenatured whey instead of cottage cheese. Undenatured whey contains the sulfur-containing amino acids methionine and cysteine compounds including cystine. Methionine is transformed into cysteine by the liver. Cellular cysteine is the rate-limiting factor in production of glutathione, the body's master antioxidant and detoxifier. Glutathione is crucial to life; it's involved in ATP energy generation, immune system support, liver and other organ support, reducing toxin load and oxidative stress, and importantly, it shrinks tumors when levels are maintained. More glutathione information including the role whey can play in cancer therapy is available here with glutathione references.
Cottage cheese doesn't boast those benefits; in fact it's only a sulfur amino acid source. The Budwig Diet revision's replacement of the bio-incompatible cottage cheese with compatible cold-processed whey adheres to the principles of the "Budwig Diet", and will provide huge additional benefit. Unlike cottage cheese, cold-processed whey is mildly alkalizing to the body, and several cold-processed wheys are listed in the US PDR as a specific anti-cachexia (anti-wasting) formula.
